The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 1984
Filed:
Dec. 20, 1982
Hiromichi Komai, Yokohama, JP;
Minoru Ameyama, Yokohama, JP;
Ricoh Company, Ltd., , JP;
Abstract
An ink supply system of an ink jet recording apparatus of the charge control type including a supply pump for feeding ink under pressure to a recording head, an accumulator for equalizing the pressure of the ink, and valve means for controlling the feeding of the ink under pressure to the recording head. The supply pump, the accumulator and the valve means are located in a piping for supplying the ink in the ink tank to the recording head in the indicated order as seen from the ink tank side. A delivery pump is located in a piping for returning ink to the ink tank from a catcher for recovering the ink ejected through the recording head but not contributing to recording of information with ink drops. The ink supply system further includes conduits and change-over valves mounted between the ink tank, supply pump and delivery pump in such a manner that the ink supply system can be switched between a condition in which the ink in the ink tank can be fed under pressure to the recording head by the supply pump and a condition in which the ink in the ink tank can be filled in the supply pump through the recovery pump.